Cooking Appliance Heating Circuit for 120/208 V Power Compatibility
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Solution Overview
Problem
Conventional cooking appliances designed for 120/240 V circuits experience reduced power output and inconsistent performance when used with 120/208 V circuits, leading to longer preheating times and compromised cooking efficiency in multiple family residential buildings.
Innovation Solution
The cooking appliance is configured with two electrical heating elements, each independently coupled to one hot wire and the neutral wire, allowing for consistent power output regardless of the voltage configuration between hot wires, ensuring optimal performance across different electrical power supply systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional cooking appliances are configured for 120/240 V circuits, then they operate efficiently on single-family residential power supplies, but their power output is reduced and performance becomes inconsistent when coupled to 120/208 V circuits in multiple-family residential buildings
Solution Approach 1:
The heating system is divided into multiple independent heating elements, each connected to a specific hot wire and neutral wire. This segmentation allows each element to operate independently on its designated voltage, ensuring consistent performance whether the supply is 120/240V or 120/208V. The first heating element connects to the first hot wire and neutral, while the second heating element connects to the second hot wire and neutral, isolating each element from voltage fluctuations in the other circuit leg.
2Adaptability or versatility
If conventional cooking appliances are coupled to 120/208 V circuits, then they can be used in multiple-family residential buildings, but preheating times increase and cooking performance becomes inconsistent
Solution Approach 1:
By segmenting the heating system into independent elements connected to different circuit legs, the patent ensures that each element receives consistent voltage regardless of the overall circuit configuration. This prevents power output reduction and maintains efficient preheating times in 120/208V environments.
Solution Approach 2:
The patent changes the electrical connection parameters of the heating elements, configuring them to connect between individual hot wires and the neutral wire rather than between hot wires. This parameter change ensures that each heating element operates at its designed power level regardless of whether the system is supplied with 120/240V or 120/208V power.
3Device complexity
If cooking appliances use a single heating element connected to hot wires, then the structure is simple, but power output varies with voltage configuration between 120/240 V and 120/208 V circuits
Solution Approach 1:
The patent applies segmentation by dividing the heating system into multiple independent elements, each with its own electrical connection to a specific hot wire and neutral wire. This increases structural complexity slightly but ensures that power output remains consistent across different voltage configurations, as each element operates independently on its designated voltage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration maintains a desired power output of approximately 4,000 W, providing efficient and consistent cooking performance whether the appliance is connected to a 120/240 V or 120/208 V circuit, addressing the issue of reduced power and performance in conventional appliances.
Implementation Method 1
electrical heating elements, such as a baking element and/or a broiling element, positioned within the oven cavity for heating food items
Data Source
AI summary
A cooking appliance is provided. The cooking appliance is coupled to a power supply that includes a first hot wire, a second hot wire and a ground wire. The cooking appliance includes a cabinet and a cavity defined within the cabinet. The cooking appliance also includes at least one heating assembly having two electrical heating elements positioned with respect to the cavity. A first electrical heating element is electrically coupled to the first hot wire and the ground wire. A second electrical heating element is electrically coupled to the second hot wire and the ground wire.